I have found it useful to wear a ghillie suit while taming one of these creatures. Open areas are preferred. (Don't want to lose track of the big guy.) You could also possibly try trapping them with structures of your choice. (I haven't tried trapping any.) Possibly a trap with an open roof where you can still reach it. Best of luck and bring tons of beer!
For beginners these things will spot you in a split of a second so don’t even think of going up to it with a stimberry in your hot bar. Instead, get a ghille suit and sneak behind it and feed it a beer! Don’t use stimberries it is pain And time consuming unless you have a bush of stimberries. They eat berries after they are tamed though. Not beer.